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Old 07-31-2019, 08:40 PM
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wpoll wpoll is offline
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Quote:
Originally Posted by Mike1261 View Post
That's my thought too. It's a 3.0i motor and the vehicle has been horribly neglected by past owners. That said, I don't really know how you can neglect a differential that doesn't require maintenance for at least 100k miles, so I'm hoping it's something I can at least prolong for a while.

Is there any benefit to going with 75w140 if it does happen to be bearings? Or would 75w90 suffice?

And I don't have access to a new drain plug or o-rings where I am. Will I have leak problems by reusing the original? Or should be it ok?

Thanks!
It's only a WAG on my part but I'm thinking the 75w-90 should be fine. At least then you know the fluid is right and good.

Don't need new drain plugs etc. - I've changed both diffs and transfer case (transfer case uses BMW power divider oil, not ATF) and never replaced the plugs etc. - zero issues.

Noise might not be diff as the driveshaft centre bearing (CSB) sometime makes a similar noise. Sounds like a diff though, from the fact it changes under deceleration....
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2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
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